Home / 18,981.60-28,475.36-9,119.04

Finding the Fourth Proportional to 18,981.60, 28,475.36 and 9,119.04

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Solution

The fourth proportional to 18,981.60, 28,475.36 and 9,119.04 is: 13,679.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981.60 : 28,475.36 = 9,119.04 : x
  2. Step 2: Convert to fraction form
    18,981.60/28,475.36 = 9,119.04/x
  3. Step 3: Cross multiply
    18,981.60x = 28,475.36 × 9,119.04
  4. Step 4: Simplify right side
    18,981.60x = 259,667,946.85
  5. Step 5: Solve for x
    x = 259,667,946.85/18,981.60
  6. Step 6: Final answer
    x = 13,679.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.